A summary report of the latest research conducted by the Department of Biological Sciences at the University of Ritz is published in the BPEX series "From Research to Action", No. 10.
The study analyzed a large amount of data, including weather, terrain, and employee factors, so that factors affect production during the summer and fall.
For sows raised outside the UK, a few days of hot days around the lactation and weaning period (average daily temperatures above 18 °C) will result in lower birth rates and increased variability.
During lactation, sows also increase in heat production as milk production increases, so the risk of heat stress increases until it is maximized before weaning.
If the ambient temperature is high, the sow may reduce feed intake and thus fail to meet the metabolic needs of lactation; thus the sow will consume its own reserves in order to meet the continued demand for lactation, resulting in decreased body condition and possibly follicles. The development process has an adverse effect. Nutritional deficiencies are associated with decreased levels of luteinizing hormone secretion, which can cause delays in estrus, a decrease in the rate of conception, and a decrease in delivery rates.
The study found that gilts were least affected by warm temperatures, probably because they did not increase their metabolic requirements before the breeding.
In order to achieve cooling on hot days, sows will direct blood to the skin and breast tissue, while the blood supply to the ovaries will decrease. This may therefore adversely affect the quality of the egg and the extent to which the uterus is prepared for pregnancy.
This study shows that when the average daily temperature exceeds 18 ° C, additional cooling measures should be provided for the sows raised outside the UK.
Management guide
The feed intake of the sows is monitored on hot days. If sow feed intake declines, steps should be taken to cool them or provide high energy concentrations of the diet.
Rolling mud ponds are provided for sows in the summer, or sprinklers are provided to cool the sows and are available as early as possible during the year. For individual fences, you can use the sow's drinker to spray water, creating a quagmire that allows the sow to stand or roll.
Paint the pig's shed in white to reflect sunlight and lower the internal temperature; painting the pig shed to white reduces the internal temperature by approximately 7oC.
The pig shed should be made of insulating material; plus painted white, this can further reduce the impact of high temperatures.
Adjustable ventilation holes on the back of the pig shed and adjust the direction of the pig shed to increase air circulation.
Feed the sows freely, or feed them twice a day.
15 lights, 30 lights, and 60 lights refer to the number of LED components welded per meter length of the LED strip. Generally speaking, the 1210 specification strip has 60 LEDs per meter, and the 5050 specification strip has 30 LEDs per meter. Special There are 60 LEDs per meter. The price of LED strips with different LED quantities is different, which is also an important factor in distinguishing the price of LED strips.
Color temperature
It refers to heating a standard black body. When the temperature rises to a certain level, the color starts to change from dark red-light red-orange-white-blue. When the color of a certain light source is the same as that of the black body, we call the absolute temperature of the black body at that time Is the color temperature of the light source.
Generally speaking, color temperature is not used as an indicator for evaluating LED strips, but many foreign customers will make a special requirement due to the use environment.
The color temperature of the light source is different, and the light color is also different:
The color temperature is below 3300K, and the light color is reddish to give a warm feeling; it has a stable atmosphere and a warm feeling. It is commonly known as warm color temperature.
The color temperature is in the middle of 3000-6000K, and people have no obvious visual psychological effect under this color, and there is a refreshing feeling; therefore, it is called "neutral" color temperature
The color temperature exceeds 6000K, and the light color is bluish, giving people a cool feeling, commonly known as cool color temperature.
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